On Thursday, a day after he had declined to make any statements critical of President Trump during a Knoxville stop, U.S. Senator Bob Corker reversed course, facing the issue of presidential problems squarely while speaking with a media group after a luncheon speech to the Chattanooga Rotary Club.Asked about Trump’s performance as President in general, and in particular about the President's way of responding to last weekend’s clash between white nationalists and counter-protestors...